2534781 has 4 divisors (see below), whose sum is σ = 3379712. Its totient is φ = 1689852.

The previous prime is 2534773. The next prime is 2534783. The reversal of 2534781 is 1874352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2534781 - 2³ = 2534773 is a prime.

It is a super-2 number, since 2×2534781² = 12850229435922, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2534783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 422461 + ... + 422466.

It is an arithmetic number, because the mean of its divisors is an integer number (844928).

2^2534781 is an apocalyptic number.

It is an amenable number.

2534781 is a deficient number, since it is larger than the sum of its proper divisors (844931).

2534781 is an equidigital number, since it uses as much as digits as its factorization.

2534781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844930.

The product of its digits is 6720, while the sum is 30.

The square root of 2534781 is about 1592.0995571886. The cubic root of 2534781 is about 136.3473854169.

The spelling of 2534781 in words is "two million, five hundred thirty-four thousand, seven hundred eighty-one".